问题
选择题
---Will you please stay here a little longer?
---Sorry, I . I eat dinner with my mother. She’s coming.
A．mustn’t; will have to
B．don’t; have to
C．can’t; had to
D．can’t; will have to
答案
答案：D
AB选线助动词用法有误，从下文来看应是将来时态，所以选D。